Evaporator.



P. KESTNER.

EVAPORATOR.

APPLICATION FILED JUNE 20, 1910. 989,982, Patented Apr. 18, 1911.

- UNITED STATES PATENT OFFICE.

. PAUL KESTNER, OF LILLE, FRANCE.

EVAPORATOR.

To all whom it may concern:

Be it known that 1, PAUL Knsrnnn, a citizen of the Republic of France,and a resident of L'ille, Department of the Nord,

France, have invented certain Improvements in Evaporators, of which thefollowing is a specification.

My invention relates to evaporating apparatus, and the object of myinvention is to provide apparatus of the long vertical tube or climbingfilm type with means at .the

upper end of the shell carrying the tubes and into which such tubesdischarge for effectually sc 'iarating vapor or steam from the liquidunder treatment.

An important feature of my improvement consists in disposing theseparator so as to surround the upper portion of the tubes in in theaccompanying drawings, in which:

l' igure 1, is a sectional elevation of one form of apparat us embodyingmy invention; Fig. 2, is a sectional plan view on the line aa, Fig. 1;Fig. 3, is a view similar .to Fig.

i 1, of another form of apparatus embodying lowertube plate 4, and maybe suitably so my invention; Fig. 4, is a sectional plan View on theline6-4 Fig. 3; Fig. 5, is a sectional plan view on the line c-c, Fig. 1,and Fig. 6, is a sectional view illustrating a modified detail of myinvention.

In Figs. 1 and 2 of the drawings, 1 represents a shell or casinginclosing a series Off long tubes 2, which extend from an inlet at thebottom ofthe structure through a cured in an upper tube plate Steam orother heating medium is admitted to the shell or casing 1 at the point 6and the water of condensation may be drawn oil in any suitable manner. 7represents a separating chamber disposed at the upper part of theapparatus and which may be formed by a shell or wall 8 having top andbottom plates 9 and 10; and. the top plate nay have a central aperture11 directly over the tubes, which may be normally closed by a coverplate 12. In some instances the structure Specification of LettersPatent.

I Application filed June 20, 1910. Serial No. 567,957.

Patented Apr. 18, 1911.

forming the separating chamber may be an integral element. The lower orbottom plate '10 is suitably secured to the shell 1, and carries anoutlet 13 for the concentrated liquid and an outlet 14 for the vaporsepa rated from said liquid. Disposed within the separating chamber andsurrounding the shell 1, is a wall 15 which may rise to a pointapproximately midway between the upper and lower plates of theseparating chamber, and depending from the top of the shell 1 is a wall16 which may be inclined and have its lower edge turned to form a gutter17; such wall ltl extending over the annular wall 15. Between the uppertube sheet and the top of the separating chamber, I may provide a seriesof tangential openings 18 through which the liquid coming from the tubesis discharged and given a centrifugal or whirling motion within theseparating chamber, etl'ecting the breaking'up of the liquid andliberation of the vapor, the liquid falling to the bottom of theseparating chamber where it is discharged through the opening 13, whilethe vapor passes under the overhanging inclined wall 16 and enters thespace between the wall 15 and the shell 1, finally discharging throughthe outlet 14. The passages for the tangential discharge of liquidpassing from the tubes maybe formed in a suitable casting disposedbetween the cover plate 12 and the upper tube sheet, and in someinstances such casting may be socured to the. cover plate, and in others'tornici l integral therewith so as to be bodily removable with saidcover plate it desired; such removal of the cover plate being necessarywhen the tubes are to be examined.

In the structure shown in Figs. 3 and 4, the vapor outlet ll is disposedin the upper portion of the separator chamber, and a wall 15 within thechamber, which may be annular and is cut away at its lower side at .apoint opposite the vapor outlet, as at 19, may be provided. In this formof the structure. the liquid discharged through the tangential openingsstrikes the inner surface of this annular wall and falls to the bottomof the. separating chamber, being dis charged through a suitable liquidaperture 13", while the vapor separated therefrom rises from said liquidand passesfrom the ooening 19 in said wall to the discharge outlet 14"of the separating chamber. The

liquid outlet 13 is shown as disposed below the cutaway portion of thewall 15, and while this is preferred, such arrangement is not essentialto the proper operation of the apparatus.

In the structure shown in Figs. 1 and 2,

the wall 15 forms a chamber or passage surrounding the upper portion ofthe tube sheet into which the vapor must pass before it is discharged.Entrained liquid is prevented from entering with the vapor by reason ofthe overhanging portion of the inclined wall 16. The gutter carried bythis inclined wall may be perforated for the escape of the .liquidcaught thereby, if desired, and in some instances such gutter may beomitted.

- I .claim:

1. In an evaporator of the climbing film type provided with verticaltubes, a casing inclosing said tubes to which a heating medium isintroduced, a vapor casing encircling the top of the evaporator andhaving a;

liquid exit at its lowest point, a vapor exit conduit opening into thechamber casing at a higher point, and a depending wall within typeprovided name to this specification in the pathway between saidtangential dis charge and said vapor exit means.

3. In an evaporator of the climbin film with vertical heated tn?) vaporseparating head comprising a casing encircling the top of the apparatus,said casing beingprovided with vapor and liquid discharge outlets,conduit forming means es, a-

within the casing comprising an annular wall forming a passage leadingto the vapor outlet and having an inletat a higher level than the levelof the liquid outlet, anda vertically depending shield surronnding thetube casing and protecting such inlet. I

4. In an evaporator of thelelimbin .film type provided with verticalheated tu es, a heating shell containingsaid tubes, a vapor separatinghead comprising a casing en-v circling the top of the apparatus, saidcasing being provided with vapor and liquid discharge outlets, asupplemental shell surrounding the heating shell' and forming a conduitwithin the casing'leading to the vapor outlet and having an inletintermediate the top and bottom of the separat ing chamber, and avertically depending shield surrounding said heating shell below thetube outlets and protecting such inlet,

said vapor outlet being below the liquid outlet. v v

In testimony whereof, I have signed my the presence of two subscribingwitnesses.

PAUL KESTNEB, Witnesses:

HENRI CHABRIER, TnfioN Pnoxnn,

